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Written by Bill Visnic
In Washington, DC at the 2018 SAE Government/Industry meeting this week, cellular-communications giant AT&amp;T affirmed in a session on connected-vehicle technology that it will launch ultra-fast mobile 5G service in limited areas sometime late this year. And although 5G cellular communications promises to be a near panacea for the safety- and security-related communication needs of vehicles with automated-driving systems (ADS), another speaker at the conference asserted that 5G&quot;s longstanding rival technology, dedicated short-range communications (DSRC), &quot;is still alive.&quot; Zach Carter, AT&amp;T&quot;s principal member of the technical staff of IoT Solutions product development, said the company &quot;has been laying the groundwork for some time,&quot; for 5G deployment, calling 5G &quot;a strategy to enable a connected ecosystem&quot; for vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication, as well as for an endless list of other internet-connected devices. AT&amp;T announced in early January that it will introduce mobile 5G service in a dozen U.S. markets in late 2018. Carter said that in addition to theoretical speeds up to 400 Mbps, 5G offers extremely low latency, high throughput and &quot;massive connectivity&quot; capability. He added that the new 5G service will be standards-based (a crucial point for future universal adoptability) and will be backed by an all-new software platform called Network 3.0 Indigo. Shortly after in the conference session, John Capp, director of global safety at GM, stated that DSRC, cellular technology&quot;s chief competitor in ADS-related vehicle communications, is &quot;still alive,&quot; although many have questioned DSRC&quot;s usefulness if 5G cellular service become ubiquitous. Capp reminded that GM&quot;s Cadillac brand made the 2017 CTS the first production vehicle to be fitted with DSRC capability. Advocates of DSRC point out that the technology, which has a range limited to about 300 m (984 ft), is available right now, while 5G has not yet reached pilot-program deployment; DSRC requires dedicated infrastructure, however, and the costs associated with a widespread buildout that already is in place for cellular communications. AT&amp;T&quot;s Carter reminded that the company has demonstrated a &quot;bridge&quot; system that combines DSRC with cellular LTE service to transmit DSRC signals beyond its 300-m range. That demonstration was conducted with partners Delphi and Ford in 2017.